CN203275251U - Smoke detecting and ventilating device of highway tunnel - Google Patents
Smoke detecting and ventilating device of highway tunnel Download PDFInfo
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- CN203275251U CN203275251U CN 201320346051 CN201320346051U CN203275251U CN 203275251 U CN203275251 U CN 203275251U CN 201320346051 CN201320346051 CN 201320346051 CN 201320346051 U CN201320346051 U CN 201320346051U CN 203275251 U CN203275251 U CN 203275251U
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Abstract
The utility model discloses a smoke detecting and ventilating device of a highway tunnel. Photoelectric sensors are arranged at multiple spots in the tunnel. The smoke detecting and ventilating device of the highway tunnel further comprises a band-pass filter circuit, an amplifying circuit, an AD (Analog to Digital) conversion circuit and a single chip microcomputer which are electrically connected with one another in sequence, wherein the single chip microcomputer is electrically connected with a control motor output circuit, an acousto-optic alarm circuit and a pre-alarm display circuit; the photoelectric sensors are used for detecting smoke concentration in air in the tunnel; the band-pass filter circuit is used for de-noising and removing interference for an electric signal for smoke concentration detection to obtain a filter signal; the amplifying circuit is used for amplifying the filter signal to obtain an analog signal; the AD conversion circuit is used for converting the analog signal into a digital signal; the single chip microcomputer is used for receiving the digital signal, analyzing and processing the received digital signal, and comparing the signal with a set smoke concentration value. When a measured smoke concentration value exceeds the set value, the single chip microcomputer is used for starting up a tunnel air blower and an acousto-optic alarm respectively by the control motor output circuit, the acousto-optic alarm circuit and the pre-alarm display circuit, and pre-alarm information is displayed on a lattice screen.
Description
Technical field
The utility model relates to a kind of vcehicular tunnel flue dust and detects and ventilation unit.
Background technology
In recent years, along with the develop rapidly of highway communication cause, a large amount of vcehicular tunnels are used widely.Vcehicular tunnel is when making huge contribution for national economy, and it is more and more outstanding that the safety problem of its operation also seems.Dust concentration in the tunnel exceeds standard and usually can bring out serious traffic hazard, and the traffic hazard that takes place frequently will cause great life and/or property loss to society and individual.How effectively to prevent the generation of traffic hazard in vcehicular tunnel, person and the network operator problem in the urgent need to address that become the tunnel construction.
In vcehicular tunnel, the formation reason of flue dust is to have ponding and dust in vcehicular tunnel, when temperature raises, surface gathered water is met thermal evaporation, after the tunnel upper air is met cold liquefaction, forms on the one hand water smoke, meet with dust on the one hand, formed larger solid particle.Especially under southern moist climate, the vcehicular tunnel internal-external temperature difference is larger, and a large amount of dischargings of vehicle exhaust make the dust concentration in vcehicular tunnel increase, and have reduced driver and conductor's sight line visibility, very easily cause traffic hazard.
The utility model content
The problems referred to above for the highway communication existence, the utility model provides a kind of vcehicular tunnel flue dust to detect and ventilation unit, for detection of the dust concentration in vcehicular tunnel, and when dust concentration in vcehicular tunnel exceeds standard and affects the driver and conductor and drive a vehicle sight line, in time open ventilating system, by the Reduced Speed Now of audible-visual annunciator reminding driver, reach the alertness that improves the driving personnel, the purpose that reduces the traffic hazard generation with this.
The technical scheme that the utility model solves the problems of the technologies described above is as follows:
A kind of vcehicular tunnel flue dust detects and ventilation unit, be included in the photoelectric sensor that in vcehicular tunnel, multiple spot is installed, it is characterized in that: also comprise the bandwidth-limited circuit, amplifying circuit, A/D convertor circuit and the single-chip microcomputer that are electrically connected to successively, described single-chip microcomputer is electrically connected to control motor output circuit, sound light alarming circuit and early warning display circuit respectively again; Described bandwidth-limited circuit is in series successively by second order high-pass filtering circuit and second-order low-pass filter circuit, and described high-pass filtering circuit and low-pass filter circuit are by OP07 amplifier chip and resistance and electric capacity composition, and its band connection frequency is adjustable.
Wherein, described photoelectric sensor is for detection of airborne dust concentration in the tunnel, and described bandwidth-limited circuit is used for the current signal that dust concentration detects is carried out de-noising and except disturbing, obtains filtering signal; Described amplifying circuit is used for filtering signal is amplified, and obtains simulating signal; Described A/D convertor circuit is used for analog signal conversion is become digital signal; After described single-chip microcomputer receives digital signal, carry out analyzing and processing according to its internal processes, compare with the dust concentration value of setting.When the dust concentration in vcehicular tunnel surpasses the dust concentration value of this setting, the described control motor of described Single-chip Controlling output circuit, sound light alarming circuit and early warning display circuit, start respectively tunnel blower and audible-visual annunciator, and in dot matrix screen display early warning information.
For implementation structure optimization, improve combination property of the present utility model, further measure of the present utility model is:
Described photoelectric sensor is infrared tube type photoelectric sensor, and it comprises paired optical transmitting set and optical receiver.
The amplifier model that described amplifying circuit adopts is AD620.
The AD converter chip that described A/D convertor circuit adopts is TLC1543.
The chip of described single-chip microcomputer is AT89S52, and its peripheral circuit also comprises memory circuit and resets and crystal oscillating circuit.The storage chip that described memory circuit adopts is 24C02.
Described control motor output circuit is used for controlling ventilating system, and this ventilating system comprises described tunnel blower and corresponding motor.
The utility model utilizes the characteristic of photoelectric sensor, send Ray Of Light from optical transmitting set, scattering and refraction action due to air dust in vcehicular tunnel, the photosignal that arrives corresponding optical receiver at last can be exported proportional current signal along with the size variation of dust concentration in vcehicular tunnel, be converted into digital signal through filter filtering, amplifier amplification and AD converter again, it is read in the central processing unit single-chip microcomputer, and single-chip microcomputer carries out analyzing and processing to digital signal.When dust concentration did not affect traffic and normally moves, ventilating system, audible-visual annunciator all were failure to actuate, and dot matrix screen shows " traffic is normal ".When dust concentration exceeds standard, the Single-chip Controlling ventilating system is carried out the air draft action, audible-visual annunciator starts, dot matrix screen display at the tunnel portal place " has flue dust; ask Reduced Speed Now, takes care " in the tunnel, can the reminding driver deceleration drive like this, reduce the driving in the tunnel dangerous, eliminated the dangerous hidden danger that exists.
The useful technique effect that the utility model produces compared to existing technology is:
1. the utility model is useful in and installs in middle long-highway-tunnel and use, completion the blank that in vcehicular tunnel, flue dust is reported to the police.
2. when in vcehicular tunnel, flue dust being arranged, the reminding driver Reduced Speed Now reduces dangerous.
3. existing sound and light alarm prompting, have again the dot matrix screen display to show prompting, double insurance.
4. system reaches Automatic Control, early warning at any time, and can automatically terminate dangerous hidden danger.
5. simple in structure, easy for installation, cost is low, and cost performance is good.
Description of drawings
Fig. 1 is the system principle diagram of the detection of the utility model vcehicular tunnel flue dust and ventilation unit;
Fig. 2 is the system software workflow diagram of the detection of the utility model vcehicular tunnel flue dust and ventilation unit;
Fig. 3 is that the utility model vcehicular tunnel flue dust detects and the hardware of ventilation unit connects overall layout chart;
Fig. 4 is signal filter circuit of the present utility model and amplification circuit diagram;
Fig. 5 is AD conversion of the present utility model, control and early warning output display circuit figure.
In figure: 1-photoelectric sensor, 2-bandwidth-limited circuit, 3-amplifying circuit, 4-AD change-over circuit, the 5-single-chip microcomputer, 6-controls motor output circuit, 7-sound light alarming circuit, 8-early warning display circuit, 9-memory circuit, 10-reset and crystal oscillating circuit, 11-tunnel blower, 12-dot matrix screen.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Fig. 1 is the system principle diagram of the detection of the utility model vcehicular tunnel flue dust and ventilation unit.As shown in Figure 1, this vcehicular tunnel flue dust detection and ventilation unit comprise optical transmitting set, optical receiver, photoelectric sensor, bandpass filter, amplifier, AD converter, single-chip microcomputer, ventilating system and audible-visual annunciator and LCDs.Wherein, optical transmitting set and optical receiver multiple spot in couples are arranged in vcehicular tunnel, and photoelectric sensor detects airborne dust concentration in the tunnel.Photoelectric sensor, bandpass filter, amplifier, AD converter, single-chip microcomputer are electrically connected to successively, then single-chip microcomputer is connected with ventilating system, audible-visual annunciator and LCDs respectively again, single-chip microcomputer is used for controlling ventilating system, audible-visual annunciator and LCDs, start respectively tunnel blower and audible-visual annunciator, and in dot matrix screen display early warning information.
Fig. 2 is the system software workflow diagram of the detection of the utility model vcehicular tunnel flue dust and ventilation unit.Referring to Fig. 1 and Fig. 2, the photoelectric sensor that is arranged in vcehicular tunnel is responded to the signal that in the tunnel, in air, dust concentration changes, and detects the electric signal that dust concentration obtains, and carries out de-noising and removes and disturb through bandwidth-limited circuit, obtains filtering signal.Then, then amplify through amplifier AD620, obtain a simulating signal of being convenient to process.This simulating signal is admitted to AD converter TLC1543, is converted into digital signal through AD.Digital signal is admitted to single chip computer AT 89S52 chip, and single chip computer AT 89S52 chip carries out analyzing and processing after receiving signal from photoelectric sensor, compares with the dust concentration value that sets.During less than setting value, in the expression vcehicular tunnel, dust concentration is normal, need not to ventilate when the measured value of dust concentration, and ventilating system and audible-visual annunciator are not worked.when the measured value of dust concentration exceeds setting value, single chip computer AT 89S52 chip controls LED lamp and hummer carry out sound and light alarm, single chip computer AT 89S52 chip controls relay is connected simultaneously, control the motor output circuit and control the motor entry into service, carry out smoke-discharging and ventilating by tunnel blower, slowly reduce the dust concentration in vcehicular tunnel, the dot matrix screen flickering display is such as " flue dust being arranged in the tunnel simultaneously, please Reduced Speed Now, take care " information warning, allow people recognize the situation that occurs in the tunnel, reduce travel speed, thereby avoid causing because sight line is unclear traffic hazard.During when the dust concentration reduction and lower than setting value, motor shuts down, and LED lamp and hummer stop sound and light alarm, and dot matrix screen shows " traffic is normal ".
In the utility model reset and crystal oscillating circuit is used for guaranteeing that single-chip microcomputer reliablely and stablely works.Also can be recorded to concrete numerical value, the time of this concentration over-standard on storage chip when dust concentration exceeds standard, in the tunnel, flue dust generation reason provides foundation in order to analyze.
The utility model adopts the automatic Detection ﹠ Controling of total system, need not personnel's Real Time Monitoring, has saved manpower; Blower fan does not need to work long hours yet simultaneously, has reduced energy consumption, has extended the serviceable life of blower fan.
Fig. 3 is that the utility model vcehicular tunnel flue dust detects and the hardware of ventilation unit connects overall layout chart.As shown in Figure 3, according to signal processing sequence, the utility model comprises photoelectric sensor 1, bandwidth-limited circuit 2, amplifying circuit 3, A/D convertor circuit 4 and the single-chip microcomputer 5 that is electrically connected to successively, and single-chip microcomputer 5 is electrically connected to control motor output circuit 6, sound light alarming circuit 7 and early warning display circuit 8 respectively again.In addition, the peripheral circuit of single-chip microcomputer 5 also comprises memory circuit 9, resets and crystal oscillating circuit 10.
Bandwidth-limited circuit 2 of the present utility model is in series successively by second order high-pass filtering circuit and second-order low-pass filter circuit, and high-pass filtering circuit and low-pass filter circuit are by OP07 amplifier chip and resistance and electric capacity composition.The signal that 2 pairs of photoelectric sensors 1 of bandwidth-limited circuit gather carries out filtering to be processed, and isolates the flue dust signal, filters clutter.Bandwidth-limited circuit of the present utility model uses infrared tube type photoelectric sensor, according to soot dust granule in air what, light is in the laggard light intensity size that enters light receiving tube of scattering refraction, measures airborne dust concentration.
Amplifying circuit 3 of the present utility model adopts instrumentation amplifier chip AD620, filtered feeble signal is amplified the magnitude of voltage that can process to reach single-chip microcomputer.
A/D convertor circuit of the present utility model adopts the TLC1543AD conversion chip, the signal after amplifying is carried out modulus process.
The utility model adopts the AT89S52 singlechip chip as processor, whether reach the dust concentration value that designs in program according to the signal voltage size that transmits, control motor by the Control forceful electric power, the on off control of realization to the FD tunnel blower, thereby to ventilating in vcehicular tunnel, get rid of the flue dust in the tunnel, solve its issuable hidden danger.
Sound light alarming circuit 7 of the present utility model is to start when dust concentration surpasses the setting value that allows in the tunnel, the flicker of LED lamp and hummer are rung, the driving personnel that enter in the tunnel are reminded, prevent driver's scorch in the tunnel blindly, avoid occuring unnecessary traffic hazard.
Early warning display circuit 8 of the present utility model is to carry out dot matrix according to the flue dust situation in the tunnel to show.During lower than setting value, dot matrix screen shows " traffic is normal ", " in the tunnel, all are normal " or " the place ahead transportation condition is good " when the dust concentration in the tunnel.And when dust concentration exceeded standard, dot matrix screen showed " flue dust is arranged in the tunnel, ask Reduced Speed Now, take care ".Like this, just be combined the effect of having played double warning with sound and light alarm.
Fig. 4 is signal filter circuit of the present utility model and amplification circuit diagram.Referring to Fig. 4, enter bandwidth-limited circuit 2 from the photo-sensor signal will C1 (1) of photoelectric sensor 1.Bandwidth-limited circuit 2 is in series successively by second order high-pass filtering circuit and second-order low-pass filter circuit, high-pass filtering circuit and low-pass filter circuit are by OP07 amplifier chip and corresponding resistance and electric capacity composition, and its band connection frequency is adjustable, plays the effect of bandpass filtering.Amplifying circuit 3 is comprised of AD620 amplifier chip and relevant capacitance resistance, the feeble signal from photoelectric sensor is amplified, thereby meet design requirement.
Fig. 5 is AD conversion of the present utility model, control and early warning output display circuit figure, there is shown A/D convertor circuit 4, single-chip microcomputer 5, control motor output circuit 6, sound light alarming circuit 7, early warning display circuit 8, and memory circuit 9, reset and crystal oscillating circuit 10.Wherein, the analog signal conversion that A/D convertor circuit 4 is sent photoelectric sensor here becomes digital signal, and the chip of AD converter is TLC1543.Singlechip chip is AT89S53, it is central processing unit of the present utility model, analyze and process photo-sensor signal will, and making a response, respectively to controlling motor output circuit 6, sound light alarming circuit 7, early warning display circuit 8, memory circuit 9, resetting and crystal oscillating circuit 10 carries out corresponding control.The motor that control motor output circuit 6 uses by relay, carries out light current to the control of forceful electric power as FD tunnel blower 11.Sound light alarming circuit 7 comprises LED lamp and hummer BUZ1, carries out sound and light alarm when the dust concentration in the tunnel exceeds standard.Early warning display circuit 8, when the dust concentration in the tunnel exceeds standard, early warning display circuit 8 is controlled dot matrix screen 12 and is shown early warning information, as " flue dust being arranged; ask Reduced Speed Now in the tunnel; take care ", can remind intuitively like this people to note flue dust situation in the tunnel, the dot matrix screen that uses is commercial dot matrix screen.Time and the alarm times of reporting to the police in 9 pairs of tunnels of memory circuit are carried out record, and the chip that uses is the 24C02 storage chip.The utility model also comprises the miniperipheral circuit of single-chip microcomputer, namely reset and crystal oscillating circuit 10, it can guarantee that single-chip microcomputer reliablely and stablely works, also can be recorded to concrete numerical value, the time of this concentration over-standard on storage chip when dust concentration exceeds standard, in the tunnel, flue dust generation reason provides foundation in order to analyze.
Principle of work of the present utility model is: utilize photoelectric effect, send Ray Of Light from optical transmitting set, to scattering of light and refraction action, the photosignal that arrives at last optical receiver can be exported along with the variation of dust concentration size in the tunnel electric signal of corresponding proportion due to airborne flue dust.This device will in the inner uniform stationing sampling of the vcehicular tunnel more than a kilometer, detect the solid-liquid concentration of suspended particles of tunnel internal air.This device presets threshold value in single-chip microcomputer, after measured value surpasses predetermined threshold value, and sound and light alarm, and show early warning information by LCD display, and remind the driver, the ventilating system of opening simultaneously in the tunnel is carried out dust removal by ventilation.When the concentration of smog, dust is reduced to normal range, all clear, ventilating system is automatically out of service.The use of this device will reduce the traffic hazard odds, improve the travel safety in vcehicular tunnel.
Claims (6)
1. a vcehicular tunnel flue dust detects and ventilation unit, be included in the photoelectric sensor (1) that in vcehicular tunnel, multiple spot is installed, it is characterized in that: also comprise the bandwidth-limited circuit (2), amplifying circuit (3), A/D convertor circuit (4) and the single-chip microcomputer (5) that are electrically connected to successively, described single-chip microcomputer (5) is electrically connected to control motor output circuit (6), sound light alarming circuit (7) and early warning display circuit (8) respectively again; Wherein, described bandwidth-limited circuit (2) is in series successively by second order high-pass filtering circuit and second-order low-pass filter circuit, and described high-pass filtering circuit and low-pass filter circuit are by OP07 amplifier chip and resistance and electric capacity composition, and its band connection frequency is adjustable.
2. vcehicular tunnel flue dust according to claim 1 detects and ventilation unit, and it is characterized in that: described photoelectric sensor (1) is infrared tube type photoelectric sensor, and it comprises paired optical transmitting set and optical receiver.
3. vcehicular tunnel flue dust according to claim 2 detects and ventilation unit, it is characterized in that: the amplifier model that described amplifying circuit (3) adopts is AD620.
4. vcehicular tunnel flue dust according to claim 3 detects and ventilation unit, it is characterized in that: the AD converter chip that described A/D convertor circuit (4) adopts is TLC1543.
5. according to claim 1-4 described vcehicular tunnel flue dust of any one detect and ventilation unit, it is characterized in that: the chip of described single-chip microcomputer (5) is AT89S52, its peripheral circuit also comprises memory circuit (9) and resets and crystal oscillating circuit (10), and the storage chip that described memory circuit (9) adopts is 24C02.
6. vcehicular tunnel flue dust according to claim 5 detects and ventilation unit, it is characterized in that: described control motor output circuit (6) is used for controlling ventilating system, and this ventilating system comprises tunnel blower (11) and corresponding motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320346051 CN203275251U (en) | 2013-06-14 | 2013-06-14 | Smoke detecting and ventilating device of highway tunnel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320346051 CN203275251U (en) | 2013-06-14 | 2013-06-14 | Smoke detecting and ventilating device of highway tunnel |
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| CN203275251U true CN203275251U (en) | 2013-11-06 |
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| CN 201320346051 Expired - Fee Related CN203275251U (en) | 2013-06-14 | 2013-06-14 | Smoke detecting and ventilating device of highway tunnel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237095A (en) * | 2014-10-13 | 2014-12-24 | 北京市环境保护科学研究院 | Rising dust discharge measurement system and method in road sweeping process |
| CN106033045A (en) * | 2015-12-30 | 2016-10-19 | 天津市畅和科技有限公司 | Optical-mechanical-electrical-integrated PM2.5 detection system |
| CN106679041A (en) * | 2016-11-17 | 2017-05-17 | 江苏智石科技有限公司 | Intelligent self-detecting control type industrial ventilation device |
-
2013
- 2013-06-14 CN CN 201320346051 patent/CN203275251U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237095A (en) * | 2014-10-13 | 2014-12-24 | 北京市环境保护科学研究院 | Rising dust discharge measurement system and method in road sweeping process |
| CN106033045A (en) * | 2015-12-30 | 2016-10-19 | 天津市畅和科技有限公司 | Optical-mechanical-electrical-integrated PM2.5 detection system |
| CN106679041A (en) * | 2016-11-17 | 2017-05-17 | 江苏智石科技有限公司 | Intelligent self-detecting control type industrial ventilation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20160614 |
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| CF01 | Termination of patent right due to non-payment of annual fee |